H3C Technologies H3C SecBlade LB Cards - Manual (Page 104)

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• The Negative state of the track entry shows that the link where the active interface resides has failed,
and a standby interface changes to the active interface for data transmission.
• The always Invalid state of the track entry shows that the association does not take effect and each
interface keeps its original forwarding state. When the track entry turns to Invalid from other state,
a standby interface becomes the active interface.
You can associate a nonexistent track entry with an interface. The association takes effect only after you
use the track command to create the track entry. For more information, see "Configuring interface
backup."
To associate Track with interface backup:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Associate the interface with a
track entry.
standby track track-entry-number Not configured by default.
NOTE:
You can associate an interface with only one track entry. If you execute the standby track command
multiple times, the most recent configuration takes effect.
Displaying and maintaining track entries
Task Command Remarks
Display information about the
specified or all track entries.
display track { track-entry-number | all } [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Track configuration examples
VRRP-Track-NQA collaboration configuration example
In this example, the master monitors the uplink.
Network requirements
• As shown in Figure 43 , configure Host A to access Host B on the Internet. The default gateway of
Host A is 10.1.1.10/24.
• LB A and LB B belong to VRRP group 1, which has the virtual IP address 10.1.1.10.
• When LB A works properly, packets from Host A to Host B are forwarded through LB A. When NQA
detects that a fault is on the uplink of LB A, packets from Host A to Host B are forwarded through LB
B.